I'm so glad this was a real pack. I knew that after all the hints after Growing Together, we HAD to be getting horses, but the evidence from the key reseller sites was shaky at best, and when I saw that strange description, I KNEW it was fake. I was holding out for Tuesday to bring an official announcement, and well, it happened--three years after that fake leak, and 9 years after TS4 launched. I will be buying this one on launch, as I've been waiting on horses for 5 years almost (I either bought TS4 in the summer of '18 or the summer of '19).
Hopefully, horses will be as easy as Sims in TS4. Part of the reason I don't play TS3 much (even with a computer that runs it OK) is that CAS is absolutely infuriating.
Also, I'm glad to see some missing items worn by the cowgirls that served as the models for my Sims--like chaps, square-toe (and well-worn) boots, and a little less awkward hat.
I'm probably keeping a large number of the premade/townie Sims that reside in the world that ships with this pack.